It goes through the gear I use the various types of seismometers etc with a block diagram of the setup
There is also a section at the bottom of the page showing the setup I had in New Zealand prior to moving to Australia

You will see I make reference to Larry Cochrane's equip I bought. Larry is in Redwood City, Calif. a bit south of San Francisco
He is a genius at hardware and software development. I have been using his A to D system and software since he developed it in the early - mid 1990's
It has undergone many improvements since those early days. Have a look here for gear he has for sale .....